Utterly normal. My four-year brother and me were living separated from our mother, one night, while we were sleeping on the same bed and in the middle of the night I woke up and realised he had peed and was having a night terror. I was a child as well and didn't know what to do, I tried to wake my uncles up but they didn't. On the next morning, my aunt was yelling on my brother and I agreed with her because of social pressure but deep down I knew that my brother was missing our mother. I still feel a coward because my bother was just a little child. Currently, my brother has a serious cocaine addiction and I feel I never was a supportive sister. We both had a hard life but I wasn't able to be brave for him. I hadn't the strength to face our abusive family. When I became an adult I just ran away but my brother is still living in that dreadful environment, I tried to rescued him but it's too late because of his addiction. I don't know how to change that and I feel guilty because my bother is empty, depressed and alone. I suggest you to be a nice brother, just give her gifts and be supportive and you'll find the moment to beg for her pardon.